ADSP-BF53x/BF56x Blackfin Processor Programming Reference
2-51
Computational Units
The following example shows the input value downshifted.
R0 contains 0000 B6A3 ;
R1 = R0 >> 0x04 ;
results in
R1 contains 0000 0B6A ;
The following example shows the input value upshifted.
R0.L contains B6A3 ;
R1.H = R0.L << 0x04 ;
results in
R1.H contains 6A30 ;
Register Shifts
Register-based shifts use a register to hold the shift value. When a register
is used to hold the shift value (for
ASHIFT
,
LSHIFT
or
ROT
), then the shift
value is always found in the low half of a register (
Rn.L
). The bottom six
bits of
Rn.L
are masked off and used as the shift value.
The following example shows the input value upshifted.
R0 contains 0000 B6A3 ;
R2.L contains 0004 ;
R1 = R0 ASHIFT by R2.L ;
results in
R1 contains 000B 6A30 ;
Содержание ADSP-BF53x Blackfin
Страница 38: ...Conventions xxxviii ADSP BF53x BF56x Blackfin Processor Programming Reference...
Страница 134: ...System Reset and Powerup 3 18 ADSP BF53x BF56x Blackfin Processor Programming Reference...
Страница 324: ...Instruction Overview 7 20 ADSP BF53x BF56x Blackfin Processor Programming Reference...
Страница 486: ...Instruction Overview 13 28 ADSP BF53x BF56x Blackfin Processor Programming Reference...
Страница 512: ...Instruction Overview 14 26 ADSP BF53x BF56x Blackfin Processor Programming Reference...
Страница 604: ...Instruction Overview 15 92 ADSP BF53x BF56x Blackfin Processor Programming Reference...
Страница 688: ...Instruction Overview 18 48 ADSP BF53x BF56x Blackfin Processor Programming Reference...
Страница 742: ...Instruction Overview 19 54 ADSP BF53x BF56x Blackfin Processor Programming Reference...
Страница 752: ...Examples 20 10 ADSP BF53x BF56x Blackfin Processor Programming Reference...
Страница 780: ...Product Identification Register 21 28 ADSP BF53x BF56x Blackfin Processor Programming Reference...
Страница 790: ...ADSP BF535 Flags A 10 ADSP BF53x BF56x Blackfin Processor Programming Reference...
Страница 800: ...Performance Monitor Registers B 10 ADSP BF53x BF56x Blackfin Processor Programming Reference...
Страница 994: ...Instructions Listed By Operation Code C 194 ADSP BF53x BF56x Blackfin Processor Programming Reference...
Страница 1042: ...Index I 40 ADSP BF53x BF56x Blackfin Processor Programming Reference...